Phase detector
First Claim
1. Phase detector circuitry comprising:
- oscillator circuitry configured to provide a sawtooth oscillator signal;
edge detection and correction circuitry configured to;
receive an in-phase signal and a quadrature signal;
provide an edge detection signal during each edge of the in-phase signal and the quadrature signal; and
provide an edge correction signal, wherein the edge correction signal is based on whether the edge is in the in-phase signal or the quadrature signal and whether the edge is a rising edge or a falling edge;
sampler circuitry coupled to the oscillator circuitry and the edge detection and correction circuitry, the sampler circuitry configured to sample the sawtooth oscillator signal in response to the edge detection signal; and
adder circuitry coupled to the sampler circuitry and the edge detection and correction circuitry, the adder circuitry configured to subtract the edge correction signal from the sampled sawtooth oscillator signal to provide a phase estimate signal.
1 Assignment
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Accused Products
Abstract
Phase detector circuitry includes oscillator circuitry, edge detection and correction circuitry, sampler circuitry, and adder circuitry. The oscillator circuitry is configured to provide a sawtooth oscillator signal. The edge detection and correction circuitry is configured to receive an in-phase signal and a quadrature signal, provide an edge detection signal during each edge of the in-phase signal and the quadrature signal, and provide an edge correction signal based on whether the edge is in the in-phase signal or the quadrature signal and whether the edge is a rising edge or a falling edge. The sampler circuitry is configured to sample the sawtooth oscillator signal in response to the edge detection signal. The adder circuitry is configured to subtract the edge correction signal from the sampled sawtooth oscillator signal to provide a phase estimate signal.
5 Citations
12 Claims
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1. Phase detector circuitry comprising:
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oscillator circuitry configured to provide a sawtooth oscillator signal; edge detection and correction circuitry configured to; receive an in-phase signal and a quadrature signal; provide an edge detection signal during each edge of the in-phase signal and the quadrature signal; and provide an edge correction signal, wherein the edge correction signal is based on whether the edge is in the in-phase signal or the quadrature signal and whether the edge is a rising edge or a falling edge; sampler circuitry coupled to the oscillator circuitry and the edge detection and correction circuitry, the sampler circuitry configured to sample the sawtooth oscillator signal in response to the edge detection signal; and adder circuitry coupled to the sampler circuitry and the edge detection and correction circuitry, the adder circuitry configured to subtract the edge correction signal from the sampled sawtooth oscillator signal to provide a phase estimate signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for estimating phase comprising:
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receiving an in-phase signal and a quadrature signal by edge detection and correction circuitry; generating a sawtooth oscillator signal by oscillator circuitry; sampling the sawtooth oscillator signal at each edge of the in-phase signal and the quadrature signal by sampler circuitry, which is coupled to the oscillator circuitry and the edge detection and correction circuitry; and compensating the sampled sawtooth oscillator signal by adder circuitry based on whether the edge is in the in-phase signal or the quadrature signal and whether the edge is a rising edge or a falling edge to provide a phase estimate signal, wherein the adder circuitry is coupled to the sampler circuitry and the edge detection and correction circuitry. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification